Built-in siren should make a thief drop it. If not, the unit by Quark of New York stuns him with a remote-controlled 50,000-volt jolt ($1,250).

Being stalked? Defrauded? Catch ’em in the act with a video recorder in a cap by Privacy Connection. Also in bowtie and handbag versions ($2,100).

Don’t let an attack cloud your day. Fake umbrella by Productive Electronics is really a high-voltage stun gun. Works on one 9-volt battery ($139).

Offer to write the mugger a check, then flip a tab on the Safe/Guard pen and blast him with burning, cayenne-pepper-based gas ($25)